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Manage My Life

Craftsman Snow Thrower Model 536.881113 Speed Control Doesn't Work

by Manage My Life Last activity date:
July 11th, 2011

Last weekend I bought a used Craftsman Snow Thrower Model 536.881113. I didn't realize how poorly maintained it was till I got it home. Out of 6 forward speeds only the fastest one works. None of the two reverse speeds work. I took off the bottom plate and found that the hex shaft (p/n 1501100) was badly rusted and pitted. How does the shift speeds work? Does the friction disc wheel (p/n 1501435) slide on the hex shaft to change speeds? If so, the shaft is so badly rusted and pitted that I assume it can't slide and that's why the only speed I have is #6, the fastest speed. Before I start buying parts, I thought it best to check with you folks for some works of wisdom. Thanks for your help.

Tags:
Craftsman , Snow Removal Equipment
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Answers (13)
Mark T
If the sprocket has a bolt through it, it should come off the shaft. Soaking it down and letting it sit is the best advice I can give. If the WD-40 is not working, you can try a product cal PB Blaster. That is what I use and it works well. If it still will not come loose, look for welds around the sprocket. Some bolted then welded. The bolt is for alignment only. Please let me know if you need further assistance.
by Mark T
July 11th, 2011
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Manage My Life
I am please at how well the rusty, corroded parts are cleaning up. I'd like to remove the sprocket and hub (key 652) of the wheel assembly and chain (key 208) and clean them up. I removed the screw (key 653) that holds the sprocket onto the axle shaft (key 650). The sprocket won't budge and slide along the axle shaft. I sprayed it with WD-40 and will let it sit overnight. The sprocket is suppose to slide on the axle shaft once the screw (653) is removed isn't it? I am hoping to remove the wheel on the opposite side from the hub-lock wheel side, free the sprocket, grab hold of the hub-lock wheel and pull the axle through from the hub-lock wheel side.
by Manage My Life
July 9th, 2011
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Mark T
Anti-seize is different than WD-40. It is more of a paste that adheres to the parts. You should be able to pick it up at any local auto parts store. If you cannot find anti-seize you can use a thin coat of grease.
by Mark T
July 8th, 2011
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Manage My Life
Is "anti-seize" the same thing as WD-40?
by Manage My Life
July 7th, 2011
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Mark T
I am glade to hear you have the trunnion free. You can use fine sand paper to clean the shaft. Before you put the snow blower back together put a light coat of anti seize on the hex shaft. It should keep it from rusting. If you have a problem remembering how the snow blower goes back together, the manual usually has good pictures. Please let me know if you need further assistance.
by Mark T
July 7th, 2011
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Manage My Life
WD-40 did the trick. The trunnion slides freely on the hex shaft. Tomorrow I'll use fine sand paper to clean the rust off the shaft then spray it again with WD-40. Is fine sand paper OK or should I use emery cloth? If emery cloth, I'll have to go buy some. This weekend I will re-install the assembly in the snow blower. Sure hope I remember how it goes back.
by Manage My Life
July 6th, 2011
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Mark T
The trunnion has to slide on the hex shaft. I am sure have that figured out. The easiest way to get the trunnion to move is it to clean the shaft with emery cloth. Once you have, it cleaned up soak it again with WD-40 and let is sit. After you let it sit try to tap the trunnion off. Once it is off clean the hex shaft and the inside of the trunnion with emery cloth. Then see if the trunnion will move freely on the shaft. If it does apply a light coat of anti seize to the shaft and reassemble.
by Mark T
July 6th, 2011
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Manage My Life
Getting WD-40 on the rubber won't be a problem. Tonight I removed the hex shaft assembly (part 1501100) with the friction disc wheel (part 1501435) and trunion clutch bearing (part 337029) stuck to it. I then removed the friction disc wheel with the rubber. What I have remaining is the trunion clutch bearing stuck to the hex shaft. I sprayed it down with WD-40. Tomorrow I'll see if I can get it to slide off the hex shaft so I can sand the hex shaft and clean it up. I haven't figured out how to get the trunion off the hex shaft. Won't slide to the right in the parts drawing (gear side) because of all the rust. Can it be forced off to the left (left as in the parts drawing)? Can you give me some hints how to get it off? Thanks for your help.
by Manage My Life
July 5th, 2011
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Mark T
I would expect it is dry and once you spray the shaft with penetrating oil the rubber will soak it up. If it soaks up the penetrating oil, it will slip in drive. If the disc looks ok and you do not get anything on it, you can reuse it. Just be sure to test the drive under a load once you have the repair done. I usually pull the drive handle and pull back. If the snow blower pulls me or the tires spin, the drive should be just fine. If you forget to do this, you might find the drive does not work under a load when it is snowing.
by Mark T
July 5th, 2011
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Manage My Life
Thanks, Mark. I'll try to get the friction disk off the shaft and clean up the shaft. If the friction disk slides freely on the shaft after I've cleaned up the shaft, is there any reason to replace the friction disk?
by Manage My Life
July 4th, 2011
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Mark T
Thank you for your question.

I think you have an understanding how the speeds work. The rubber friction disc should slide on the hex shaft. The closer it is to the center of the friction pulley the slower it will go. If it seems to be stuck, I recommend removing the hex shaft first and see if you can free it up with WD-40. If you can get it to slide freely put a thin coat of anti seize on the shaft to keep if from rusting again. Then just replace the friction disc. Before putting the snow blower back together rough the surface of the friction pulley with sandpaper and clean it with brake cleaner. If any oil is left on the pulley, it will not drive. If you do not have a manual for the snow blower please click

here

. The manual has the instructions for adjusting the drive cables.

Please let me know if you need further assistance on the repair of the snow blower.

Here is a link to order any parts you need.

Sears Parts Direct

.

Thank you for using Manage my life.

Mark T.
by Mark T
July 4th, 2011
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Manage My Life
Thanks for the links. I found them earlier. Another thing that troubles me: I drained the oil. It looked like the oil had never been changed before. It was almost gray in color. I re-filled with new oil, ran the engine for 10 seconds, then drained the oil again. It came out gray again. My guess is the inside of the engine is really gunked up with degraded oil sludge even though the engine starts right up and sounds fine. Any ideas on how to clean up the inside of the engine? Thanks.
Answered in 12 hours
by Manage My Life
July 2nd, 2011
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Manage My Life
That is the thing about good deals, what you can't see may be more expensive than what was paid. It sounds like you are up to the repair task with a little help though. The expert will review and respond but if you find you need parts or a manual for your new snow thrower I attached the links for this model below.
Answered in 21 minutes
by Manage My Life
July 1st, 2011
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